Improvement in sewing-machine



ltinml Cstats @anni @ritira 'NICHOLAS Marcus, or Borsato, NEW YORK,Assrenon To eLoBE saw- INGMCH1NE COMPANY, OF SAMEPLAGE.

Leners Patent No. 99,783, dated February 15, 1870.

The Schedule referred to in these Letters Patent and making of the same.

To all whom it may concern.- Be 4it known that I, NICHQLAS MEYERS, ofBuf- 'falo, in the State of New York, have invented new -SewingMachines;.and

and useful Improvements in I do hereby declare that the followingr is afull, clear, and exact description of the same, reference being had totheac'compa-nyin'g drawings and letters-ofreference marked thereon,making a part of this specification, in which- 'Figure 1 is a sideelevation of the mechanism above and below the supporting table; yvFigure 2, a plan view of the mechanism on the under side of thesupporting' table inverted; l

Figure 3is a detached plan ofthe slide and adj ust-Y able'cloth plate; eY 'j i Fignre4, a vertical section,I showing more particularly theeccentric disk with .its curved side, 'and the lt/uhe with its pressurespring; Figure 5*,a detached vertical section, showing the recessedpresser-bar, enclosed feed-lever and stitchgangepand Figure 6, a sideelevation, showing the flange be neath thetable, the slidingneedle-'chamber block. and

its 4operating.; lever'.

To enable those skilled inthe artto make andvuse my invention, I nowproceed to describe its constrncg tion vand operation.

Similar letters in the drawings refer to like parts. This inventionconsists of diversnew and vuseful devices relating, in part, tosewing-machines generally, aad in part, to. a. Vsewiiig-machine whichproduces either the lock-stitch or the double-loop stitch at pleasure.

'This invention includes a mechanism for communicating'movement fromthemotor-shai't to the shuttlecarrier; also a needle-clamp in the lowerpart ofthe needle-bar, which admits of a movement ofthe needle in ahorizontal direction toward or from the shuttle; also a controller-bar,pivoted uponthe lower side ofthe sup porting table, and jointed to thevibrating block that carries the looper, which forms the loop-stitch,for the purpose ot'directing such louper in the proper path; also aneedle-chamber block, capable of being lowered faienough to leave asnflicient interval between its upper `end andthe lower surface of thesupporting table, in

which the curved looper may enter and catch the bight ofthe upperthread, which block may be raised when the looper is'not to be used, sothat its chamber shall be continuous ,with the needle-hole in thecloth-plate and finally, a mechanism on the lower side of such ta ble,for communicating the motion oi' the shuttle-driving apparatus to thesaid vibrating block carrying the looper, said mechanism being socontrived that itmay be disconnected, at any time, from such'shuttle-driving apparatus, when the latter o nly is to be used.

'the lower end of which is joint'ed to one extremity of the split rod b,on the under side of the table B, which rod is jointed at its otherextremity to one| end ofthe elbow-lever b', the oppositeend of which ispivoted to the split rod b", which connects the elbow-lever with theshuttle-carrier e. The 'vibrating motion of the elbow-lever is thus'converted into the reciprocating inotion required by the carrier.

The colmectingrods b bare each formed of two separate bars placedside byside and bolted together, afsuiiicient interval being left between theseparate` rods to admit of their being tightened upon the parts to whichthey are articulated, as the joints wear loose. It is found expedient inpractice to keep the needle, whatever its size, at a point where ,theshuttle may pass as near itx-as practicable, in order that-thelattermayalways .go through the bightbt' the'upper thread.

lt is desirable therefore to provide some means of adjusting the needlehorizontally with respect to the shuttle.

The means I employ consists vof a tube, c, having a milled exterior'flange at'one end and threaded on its outer surface, so that it may bescrewed into a horizontal orifice Imade crosswise of the needlebar e',and near its lower extremity.

ln the tube c is placed a pin, e", bearing at one end a vertical plate,c, and threaded exteriorly, sofas to receive a nut, e, upon its outerend, at the opposite side of the needle-bar.

The pin e'has an orifice made vertically through it, wherein is placedthe needle e5, which is clamped between the plate and the flange of thetube e.

On loosening a little the nut e, the tube e may be screwed out ot' theneedle-bar, carrying before it the needle., pin c and vertical plate e,the former still clamped between the othertwo in a horizontal direc'tion, until the movement is cheeked by the, striking of the nut ctagainst the needle-bar. lt' the adjustment be not then complete, the nutmaybe again loosened. On screwing the tube e back through theneedle-Ibai', the pin c" becomes slackened, and should be made tol'ollow the tube by pressure. The slack is to be taken up by the nut etj The eccentric disk z at the end of the motor-shaft operatesthemed-mechanism.

The disk is bestrdden by a curved rider, h", so shaped as to`- lreceivemotion in three directions, one' upward, and two lateral.

The curved rider projects from the upper end of a tube, h', from thelower end of which projects' down- 1 ward aslotted plate, It, throughwhich a' pivot passes presser-bar 1'-, passes into and makes a jointwith the npper end of the feed-lever h, which .bears the toothedfeed-plate hf* on its lower end, and is itself pivoted in thc saidpresser-bar. Thus the three' motions of the curved rider h" arecommunicated to the feed-plate through the compound lever h'h; but asthe weight of the connecting system of leverage is insulicient to insurethe taking hold 'of the cloth by the toothed feedplate, the tube h isprovided with an inner spiral spring, h5, the extremities of which areattached, respectively, to the pivot of the slotted plate hiand asliding head, It, within the tube, which head is counected with a screw,h", in the top of the tube. lhe raising and loweringr of the slidinghead by means of the screw, regulates the tension ofthe spring and theconsi-quent pressure of the feed-plate upon the cloth.

'When it is desired to produce the looped stitch the shuttle is removed,and in its place I employ the curved looper l projecting from one end ofthe block Z, the latter heilig pivoted to the elbow-lever l2, `whichreceives a vibratory motion from the connecting bar P. lhe looperviscaused to' traverse the proper curve by means of a controller-bar,14,-pivoted at its ends to the block l1 and the supporting table,respectively. The looper moves in aA recess out for the purpose out ofthe under part ofsuch La ble.

A vertical flange, k, runs crosswise of and beneath the table, and formsa face for thc shuttle. The middle portion 7c ofthe flange k is separatefrom the rest, forming a block, sliding vertically in the' flange underthe operation ot' alever, ld', jointed to the block and pivotcd upon thetlange.

The l`v Vlc lol-contains a vertical recess, k2, which forms nerneedle-chamber, being entered by the needle every time the latter passesthrough the clothplate. When the shuttle is in use, and the curvedlooper' out ot' gear, the blocklf should be brought close up against theunder side of the slide d', as shown in g. l, so that its chamber may becontinuous with the needle-hole of the latter'. But when the loop-stitchis to be formed, this location of the block kl would prevent the looper'from crossing the path ofthe needle k to catch the bight of the upperthread. The block is then, consequently, lowered by means of the leverk", far enough to permit the looper to have free play above it.

The connecting bar l, which is pivoted, as before stated,`at' one end tothe elbow-lever li, is curved in sickle-form at' its other end, as shownin tig. l, and has a notch, L5, at such extremity.

Au arm, m, placed with such tight-ness on the pivot of the elbow-leverbas generally to tum with it, but on occasion upon it, has a pinprojecting upward from its free end. V

'lhe curved part of the connecting bar lJ has a sliding motion upon thepivot of the opposite extremity upon or away from the pin of the arm on,and locked by the slide m' and set-screw m", operating immediately uponthe arm m3 of the curved part of the connecting rod, so as to beincapable of flu-ther lateral motion, but capable oflongitudinalmovement. When lthe connecting rod l'l is thus locked upon the arm m,the vibration received by'thedlatter yfrom the elbowlever b iscommunicated tothe former, and through it indincctly to the curvedlooper, which is thus operated by direct connection with theshuttle-driving apparatus. I If .the slide an. be unloosed, the curvedpart ofthe connecting rod P be moved away from the piu of the arm m, andthe connecting rod bef'shoyed endupon its elbow-lever, the looperwithdrawnfrom above the needle-chamber block h' and thc formation ofthev loop-stitch brought to an end.

What I claim as new, and desire to secure by Letters Patent, is

1. The motor-shaft A, vibrating lever a', connecting rods b b,elbow-lever b', and shuttle-carrier c', all constructed and arranged tooperate in combination, substantially as described.

2. The combination ofthe needle-carrying bar with the flanged tubularscrew c and needle-confining block, the latte. naving a screw projectinglaterally therefrom passing through the tubular screw, and held by nute, all constructed substantially as described, for

with reference to the carrying-bar.

` 3. The pivoted controller-bar 1*, combined with the vibratinglooper-block L and elbow-levers l l, so as to guide the curved looper,substantially as specified.

4. The covering plate. d', having a hole for the needle, the face of theshuttle-race, andthe grooved adjustable block k1 in the face of therace, when so combined and arranged, substantially as described, thatcovering plate, and that the block may be adjusted in leave an openingin the race face, through which the looper may operate when the shuttleis removed.

5. The connecting bar l, having the slot l and arm m, adjustingmechanism ml nand arm m, connected with the slmttle-operatng lever b',all combined for the purpose of throwing the looper in or out ofoperation, as described.

6. rlhe sliding lever li', provided with the rider h, and combined withthe feed-lever h, work-ing on the adjustable fulcrurn t', the wholebeing operated by the eccentric a upon the motor-shaft A, substantiallyas described.

NICHOLAS MEYERS.

lVitnesses:

C. J. HAsriNes,

Notary Public for .Erie County.v

E. L. CHAMBERLAYNE.

of the bar, and its notch l5 may consequently be moved' wise towardthecurved looper as far as it will go, the looper-block is, by themovement, foldedpartially the purpose o f adjusting the position of theneedle the groove in the block coincides with the hole in thel positionbelow the covering plate, to make the racen face continuous for theoperation of the shuttle, or

